All the posts and topics that contain only an error report will be moved here after the error is corrected. This is to ensure that when users view a question in ETS Viewer, the "Discuss" button will not indicate the presence of a discussion that adds no value to the question.
The explanation of the 4th option states "...while creating multidimensional arrays, the length of the last dimension can be left unspecified." When I test it with 1.7, the length of multiple dimensions can be left unspecified, as long as no other dimension is specified after it. For example